Hail Swath Map Preview
The Bay City, MI hail swath map preview was last reviewed on August 27, 2026 and shows mapped hail estimates up to 2.50". There are 10 public hail reports, 9 public wind reports, and 0 nearby tornado reports listed for the September 12, 2021 event.
View the September 12, 2021 Bay City, MI hail event on the free interactive hail map, then check a free Hail Report by ZIP to see a more local hail signal for your area.
Impact Area and Population for the Bay City, MI Hail Map
The September 12, 2021 hail swath map for Bay City, MI covers approximately 1,775 square miles and includes an estimated 270,410 people inside the mapped footprint. The largest mapped area is in the < 0.50" hail band, covering 553 square miles. The highest estimated population exposure is in the < 0.50" hail band with 106,286 people.
| Mapped Hail Band | Impact Area | Population |
|---|---|---|
| < 0.50" | 553 sq mi | 106,286 |
| 0.50-0.75" | 519 sq mi | 100,278 |
| 0.75-1.00" | 316 sq mi | 30,673 |
| 1.00-1.25" | 176 sq mi | 20,249 |
| 1.25-1.50" | 61 sq mi | 5,175 |
| 1.50-1.75" | 53 sq mi | 4,197 |
| 1.75-2.00" | 48 sq mi | 2,190 |
| 2.00-2.25" | 39 sq mi | 1,123 |
| 2.25-2.50" | 9 sq mi | 211 |
| 2.50-2.75" | 2 sq mi | 28 |
Get a free Hail Report by ZIP to see a more local hail signal and whether the September 12, 2021 Bay City, MI hail event may have reached your area.
Housing Exposure Inside the Bay City, MI Hail Swath Map
Inside the September 12, 2021 hail swath map area for Bay City, MI, HailGeeks estimates 124,160 single-family homes, 6,527 townhomes, and 25,773 multifamily properties within the mapped storm footprint. Single-family-home exposure is highest in the < 0.50" hail band, with 49,692 single-family homes.
| Mapped Hail Band | Single-Family | Townhomes | Multifamily |
|---|---|---|---|
| < 0.50" | 49,692 | 3,008 | 12,743 |
| 0.50-0.75" | 47,778 | 2,952 | 10,401 |
| 0.75-1.00" | 15,135 | 345 | 1,176 |
| 1.00-1.25" | 5,983 | 126 | 624 |
| 1.25-1.50" | 1,926 | 68 | 418 |
| 1.50-1.75" | 1,789 | 15 | 215 |
| 1.75-2.00" | 1,184 | 5 | 155 |
| 2.00-2.25" | 560 | 7 | 39 |
| 2.25-2.50" | 96 | 1 | 2 |
| 2.50-2.75" | 17 | 0 | 0 |
Use this table to review housing exposure by hail band for the September 12, 2021 Bay City, MI hail map. To check a specific property more closely, use a free Hail Report by Address.
Counties Inside the Bay City, MI Hail Map
Hail from the September 12, 2021 storm was mapped across 16 counties in the Bay City, MI region. Gratiot County, MI had the strongest mapped signal, peaking at 2.50" with roughly 10,097 single-family homes inside the swath.
County pages group every mapped hail event in the area. For a closer look, drop to the city or ZIP level below, or run a free Hail Report by Address.
Cities Inside the Bay City, MI Hail Map
Zooming in, the swath touched 32 cities near Bay City, MI. Chesaning, MI had the strongest mapped signal at 2.00", with an estimated 555 single-family homes exposed.
City cards show where the September 12, 2021 Bay City, MI hail activity was mapped, but your ZIP can show a closer local signal. Get a free Hail Report by ZIP, and if the signal looks meaningful, ask a local pro about a Remote Hail Inspection to see whether an on-site roof or exterior review may be worth scheduling.
ZIP Codes Inside the Bay City, MI Hail Swath Map
At the ZIP level, the September 12, 2021 Bay City, MI hail map spans 64 ZIP codes. ZIP 48847 shows the strongest local signal, with mapped hail estimates up to 2.50" and an estimated single-family-home exposure of 1,609.
Check your ZIP in seconds to see whether hail activity from the September 12, 2021 Bay City, MI event was mapped near your area.
Public Hail, Wind, and Tornado Reports
Public storm report tables connected to the September 12, 2021 hail map for Bay City, MI currently list 10 public hail reports, 9 public wind reports, and 0 tornado reports.
| Date & Time | Hail Size | City | State | Description |
|---|---|---|---|---|
September 12, 2021 4:00 PM CT |
1.00 in | 5 S Breckenridge | MI | RELAYED VIA SOCIAL MEDIA. TIME ESTIMATED. |
September 12, 2021 4:01 PM CT |
1.25 in | Saint Louis | MI | No National Weather Service description provided. |
September 12, 2021 4:10 PM CT |
2.25 in | 5 S Breckenridge | MI | LOCATION APPROXIMATE. SOCIAL MEDIA PHOTOS FROM SOUTH OF BRECKENRIDGE. |
September 12, 2021 4:12 PM CT |
2.25 in | 5 E Ithaca | MI | PHOTOS FROM SOCIAL MEDIA. |
September 12, 2021 4:15 PM CT |
2.50 in | 8 E Ithaca | MI | SEVERAL MEASURED HAILSTONES BETWEEN 2 AND 2.5 INCHES. IN THE SICKLES AREA NEAR FILLMORE ROAD AND RANSOM ROAD. DENTED VEHICLES. |
September 12, 2021 4:22 PM CT |
2.00 in | 5 SW St. Charles | MI | PUBLIC RELAYED SOCIAL MEDIA PHOTOS OF 2 INCH HAIL. |
September 12, 2021 4:34 PM CT |
1.75 in | 3 NW Chesaning | MI | PUBLIC RELAYED SOCIAL MEDIA PHOTOS OF ESTIMATED GOLF BALL SIZED HAIL. |
September 12, 2021 4:38 PM CT |
1.00 in | 6 NNW Montrose | MI | PUBLIC RELAYS VIDEO ON SOCIAL MEDIA OF ESTIMATED QUARTER SIZED HAIL. |
September 12, 2021 4:40 PM CT |
1.75 in | SSW Chesaning | MI | GOLF BALL SIZED HAIL RELAYED BY FIRE DEPT/RESCUE. CONFIRMED BY PHOTOS. |
September 12, 2021 4:44 PM CT |
1.00 in | 5 NNE New Lothrop | MI | QUARTER SIZED HAIL REPORTED BY PUBLIC. |
| Date & Time | Wind Speed | City | State | Description |
|---|---|---|---|---|
September 12, 2021 3:45 PM CT | Winn | MI | ONE MILE WIDE AREA WITH TREES DOWN AND SIGNS RIPPED OFF SOME BUILDINGS. | |
September 12, 2021 4:00 PM CT | 1 NNE Saint Louis | MI | POCKETS OF TREES DOWN. RELAYED VIA SOCIAL MEDIA TIME APPROXIMATE. | |
September 12, 2021 5:11 PM CT | Clifford | MI | DISPATCH REPORTS POWER LINE DOWN IN CLIFFORD. | |
September 12, 2021 7:12 PM CT | Chesaning | MI | DISPATCH REPORTS TREES AND POWER LINES DOWN NEAR CHESANING. | |
September 12, 2021 7:29 PM CT | 6 NE Clio | MI | DISPATCH REPORTS TREES AND POWER LINES DOWN... MAINLY ALONG BRAY ROAD. | |
September 12, 2021 7:42 PM CT | 3 SSE Columbiaville | MI | DISPATCH REPORTS NUMEROUS TREES AND POWER LINES DOWN IN COLUMBIAVILLE VICINITY. | |
September 12, 2021 7:44 PM CT | 5 ENE Columbiaville | MI | TRAINED SPOTTER REPORTS LARGE TREE LIMBS BLOCKING LANES AT INTERSECTION OF COLUMBIAVILLE RD AND M-24. | |
September 12, 2021 8:12 PM CT | Yale | MI | DISPATCH REPORTS NUMEROUS TREES AND POWER LINES DOWN IN YALE. | |
September 12, 2021 6:45 PM CT | 58 mph | 5 S Shiawassee National | MI | CORRECTED MAGNITUDE...OBSERVED VIA WEATHERFLOW STATION ON BISHOP RD IN ALICIA |
| Date & Time | Rating | City | State | Description |
|---|---|---|---|---|
| No public tornado reports are available for this event. | ||||
This table includes only public storm reports connected to the September 12, 2021 Bay City, MI storm event. When available, each report may include the time, size or magnitude, city, state, and a short description.
Related Hail Maps in the Bay City, MI Region
We found 6 more hail maps with reports from the same Bay City, MI region as the September 12, 2021 event. These related maps cover storm dates from Aug 10, 2021 through Sep 7, 2021, with mapped hail estimates ranging from 0.75" to 2.00". In this set, the strongest related map reached 2.00", and the most recent map shown is from Sep 7, 2021.
If none of these related Bay City, MI hail maps look close enough to your property, check a free Hail Report by Address. It reviews hail history for a specific location — not just the broader Bay City, MI region — so you can check whether hail activity may have reached your property.
Local Hail Review Options Near Bay City, MI
Not sure whether the September 12, 2021 Bay City, MI hail map matters for your property? Start with a free Hail Report by Address to see whether hail activity was mapped for that property. If the property signal looks meaningful, you can choose a local pro serving the Bay City, MI region and ask about a Remote Hail Inspection before deciding whether an on-site roof or exterior review is worth scheduling.
Check a specific property to see whether hail activity from the September 12, 2021 Bay City, MI event — or another recent hail event — may have been mapped at that address.
Find a roof or exterior pro serving the Bay City, MI region who can help you understand what the property hail signal may mean.
A participating local pro reviews property-level hail history remotely — not just the September 12, 2021 event — to help decide whether an on-site inspection may be worth scheduling.
A free Hail Report by Address and a Remote Hail Inspection can help you look beyond the September 12, 2021 hail map visuals alone. They do not confirm property damage and do not replace an on-site inspection for a property in the Bay City, MI region, but they can help you make a more informed next decision before anyone climbs on the roof.
Frequently Asked Questions
Common questions about the September 12, 2021 Bay City, MI hail event.